One common theme is the clash of different worlds. Inuyasha is set in a feudal era full of demons and magic, while Ranma has a more modern (but still very Japanese - culture - influenced) world with martial arts and strange curses. So when the two are crossed over, the difference in their worlds often leads to interesting plotlines. Another theme is the interaction between the characters. For example, Inuyasha's brash and impulsive nature vs Ranma's own quick - tempered but also comical personality can create a lot of humorous and tense situations.
Well, adaptation is a common theme. Ranma has to adapt to the strange and dangerous world of Inuyasha, with its demons and different rules. Similarly, Inuyasha might have to adapt to Ranma's odd curse and his more modern - ish ways. Another theme is the search for a way home. If Ranma is transported to Inuyasha's world, he will likely be trying to find a way back to his own world, and this journey can be filled with all sorts of adventures, battles, and character development as he interacts with Inuyasha and the other characters from Inuyasha's world.
One common theme is the interaction between the unique characters from Ranma and the world of Pokegirls. For example, how Ranma's martial arts skills might be used in the Pokegirls' universe. Another could be the exploration of different genders, as in Ranma's curse, in the context of Pokegirls.
Adventure is also a common theme. Picture Ranma traveling through the Pokemon regions, facing different Gym Leaders and trainers. He would bring his martial arts expertise into the Pokemon battles, which would be a new and exciting take on the typical Pokemon adventure.
Power and growth. Both Inuyasha and Bleach have characters with different levels of power. In crossovers, often a character from one series has to adapt and grow in the other's world, facing new challenges that test their power.
One common theme is the clash of different cultures. Naruto's world is more about ninja villages and modern - ish (for a fantasy world) structures, while Inuyasha's is a feudal era world. So when they cross over, there's often exploration of how these different cultures interact.
A common theme is the clash of different power systems. Naruto has his chakra and various jutsu, while Inuyasha has his demon powers. When the Juubi is added into the mix, it creates a complex power dynamic.
One common theme is the clash of different power systems. Inuyasha has his demon powers and sword skills, while Fairy Tail has magic. So, in many fanfictions, they explore how these powers interact, like whether Inuyasha's Tessaiga can cut through Fairy Tail's magic barriers.
One common theme is the clash of different cultures. Since Inuyasha is set in a feudal Japanese - like world, when it crosses over with other universes, like a modern - day or a different fantasy world, there's always this interesting cultural exchange. For instance, when crossed with a Western - based fantasy world, the differences in magic systems, social hierarchies, and values become a major part of the story.
Friendship is also a big theme. Since both Ranma and Naruto value friendship highly in their original series, in the crossovers, they usually form a strong bond. They learn from each other's strengths and support each other in facing various challenges.
The setting is a common element too. When Ranma crosses over into a different world, the new setting affects his actions and the overall story. For example, if he crosses over into a post - apocalyptic world, he has to use his martial arts in new ways to survive. And of course, the humor that is characteristic of Ranma 1/2 often gets transferred and combined with the humor (if any) of the crossed - over universe.
Sure. One popular piece of Inuyasha - Ranma crossover fanfiction might be 'The Unexpected Encounter'. It combines the unique elements of both series in an interesting way. The story often has Ranma somehow ending up in the Feudal Era of Inuyasha. Another one could be 'Two Worlds Collide' which plays around with the characters' personalities from both shows and how they interact with each other in a new, fictional setting.